The typical way is some sort of homemade bone broth, since store-bought broth is usually just colored water. Some people will use zero calorie sports nutrition

The typical way is some sort of homemade bone broth, since store-bought broth is usually just colored water. Some people will use zero calorie sports nutrition drinks or some kind of magnesium and/or sodium pill (since it's not just NaCl you're losing when fasting).